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shoeish t1_j0ssi50 wrote

That square footage needed two ducts before and the lack of a wall won't change much.

Leave the second duct and pinch them down with with the damper on the diffusers if needed.

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T1Demon t1_j0t565g wrote

Not necessarily. If they were two separate rooms they would have had two separate vents regardless of square footage or one room would have no heat/ac. The two small bedrooms in my house have 1 vent each, but my bonus room is bigger than the 2 of them combined and does fine with just 1.

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flyingGoatPenis OP t1_j0tyxbz wrote

Yeah it’s two bathrooms. They combine for less than 50 sq feet. My master bedroom has over 100 and one 1 vent

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